Fixes $.expandable creating infinitely many elements whenever it was triggered.
Improves performance of $.expandable by only triggering expand on visible elements.
Fixes text overlay not working in Firefox + intermittently having issues in other browsers.
Fixes custom dashboard widgets not showing up correctly.
Formatting of production guide links
Merge branch 'master' of https://github.com/perfectsense/brightspot-cms into feature/productionguides